EP1627154A1 - Expanding anchor made of metal and placing tool therefor - Google Patents

Expanding anchor made of metal and placing tool therefor

Info

Publication number
EP1627154A1
EP1627154A1 EP04732299A EP04732299A EP1627154A1 EP 1627154 A1 EP1627154 A1 EP 1627154A1 EP 04732299 A EP04732299 A EP 04732299A EP 04732299 A EP04732299 A EP 04732299A EP 1627154 A1 EP1627154 A1 EP 1627154A1
Authority
EP
European Patent Office
Prior art keywords
expansion
anchor
sleeve
setting tool
expansion anchor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04732299A
Other languages
German (de)
French (fr)
Other versions
EP1627154B1 (en
Inventor
Oliver Hacker
Martin Linka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fischerwerke Artur Fischer GmbH and Co KG
Original Assignee
Fischerwerke Artur Fischer GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fischerwerke Artur Fischer GmbH and Co KG filed Critical Fischerwerke Artur Fischer GmbH and Co KG
Publication of EP1627154A1 publication Critical patent/EP1627154A1/en
Application granted granted Critical
Publication of EP1627154B1 publication Critical patent/EP1627154B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/08—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation
    • F16B13/0858—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation with an expansible sleeve or dowel body driven against a tapered or spherical expander plug
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/0018—Drills for enlarging a hole
    • B23B51/0045—Drills for enlarging a hole by expanding or tilting the toolhead
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/02—Percussive tool bits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/08—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/75—Stone, rock or concrete

Definitions

  • Expansion anchors made of metal and setting tool therefor
  • the invention relates to an expansion anchor made of metal with the features of the preamble of claim 1.
  • EP 0 217 053 B1 discloses an expansion anchor of this type for fastening a component to a substrate.
  • the known expansion anchor has an anchor base part with an external thread as a fastening means and a diameter-reduced expansion section that widens conically in the direction of insertion of the expansion anchor.
  • An expansion sleeve is placed axially displaceably on this expansion section.
  • This has a base body, on which protruding tabs are formed along a predetermined bending line.
  • Undercut can be produced.
  • the known expansion anchor is inserted into a cylindrical borehole and the expansion sleeve is driven onto the expansion element, for example by means of a hammer drill, and at the same time set in rotation. This creates a radial removal in the form of a borehole extension.
  • Cutting inserts made of hard metal are proposed to form the cutting edges.
  • the invention is therefore based on the object of creating an expansion anchor of the type mentioned which, with the same or improved performance, has lower manufacturing costs.
  • the expansion anchor according to the invention has an expansion sleeve made of hardened steel. In order to avoid the mentioned failure problems along the nominal bending line, this is straight. This difference is the decisive advantage of the invention. Significantly lower forces are required to buckle the expansion tongues, and these are distributed much more homogeneously along the predetermined bending line.
  • the expansion sleeve can thus be formed from a hard, high-strength material which is correspondingly more brittle than the materials previously used. A larger wall thickness can also be selected for the expansion sleeve, in particular in the area of the predetermined bending line.
  • the expansion sleeve is preferably designed as a stamped and bent part that is hardened after shaping and then assembled.
  • the expansion section has flat sliding surfaces for each expansion tongue.
  • Four sliding surfaces or spreading tongues are easy to produce, but more or less are also conceivable.
  • Flat sliding surfaces have the advantage, on the one hand, that the expansion tongues are guided flat, while a rotationally symmetrical conical expansion section would bring about a line contact. The flat guidance in turn results in a homogeneous stress distribution in the area of the predetermined bending line.
  • expansion sleeve While in the known expansion anchors the expansion sleeve has to be driven by a sleeve-like setting tool via driver claws, this type of torque transmission, which is prone to failure, can be dispensed with in this embodiment of the invention. Instead, the anchor base can pass through a stable tool is rotated. The flat sliding surfaces cause the spread tongues to be carried along. The expansion sleeve only has to be displaced axially relative to the rotating anchor base.
  • An expansion anchor designed in this way preferably has a spacer sleeve which is used to transmit impacts
  • the two sleeves can also be made in one piece.
  • a separate spacer sleeve has the advantage that the comparatively expensive material of the expansion sleeve is only used for the area required for this. If the expansion sleeve is manufactured as a stamped and bent part, it can also be used as a counterpart
  • the spacer sleeve which on the other hand does not have to rotate, can be designed with a nominal diameter in order to enable the expansion anchor to absorb lateral forces without play.
  • the anchor base preferably has in the area of
  • Fasteners on key attack surfaces In the case of an external thread as a fastening means, these can be designed, for example, as two lateral flats, in the case of an internal thread as a fastening means in the form of two lateral grooves. It is important to ensure that there is sufficient load-bearing thread
  • the invention proposes a setting tool that has corresponding key surfaces as well as a driving surface and an adapter device for receiving the setting tool, for example, in one
  • the base part of the anchor is placed on the setting tool, key engagement surfaces and key surfaces being brought into engagement with one another.
  • the drive surface sits on the expansion sleeve - or the spacer sleeve, if present.
  • the expansion anchor is then inserted into the borehole until it is seated on it
  • the setting tool is removed.
  • One embodiment of the setting tool for expansion anchors with an external thread provides that it has a sleeve-like partial body with the key surfaces on the inside and the driving surface on the end face. This results in a very simple structure.
  • a bolt-like partial body with key surfaces on the outside for example in the form of a rectangular cross section, is conceivable, with a shoulder axially adjoining this partial body to form the driving surface.
  • the invention is explained in more detail below with reference to an embodiment shown in the drawing.
  • the figure shows an expansion anchor 1 according to the invention made of metal and a setting tool 2 according to the invention.
  • the expansion anchor 1 is used to fasten an object, not shown, to a base, also not shown.
  • the expansion anchor 1 has an anchor base part 3 with an external thread 4 as fastening means for the object and a spreading section 5 which is reduced in diameter and widens conically in the direction of the anchor end 6.
  • An expansion sleeve 6 made of hardened steel with a base body 7 and four expansion tongues 8 is axially displaceably placed on the expansion section 5 as a stamped and bent part.
  • the expansion tongues 8 are spread radially outwards against a borehole wall.
  • the spreading tongues 8 have cutting edges 9 for producing an undercut.
  • the expansion tongues 8 are connected to the base body 7 via straight predetermined bending lines 10. As a result, the expansion tongues 8 can be easily bent out without the hardened steel breaking. This is also favored by the four flat sliding surfaces 11. These also have the effect that a torque can be transmitted from the anchor base part 3 to the expansion sleeve 6. So that this torque can be transferred from a tool, here the setting tool 2, to the anchor base part 3, this has key engagement surfaces 12.
  • the expansion anchor 1 has a spacer sleeve 13 with an end face 14.
  • the spacer sleeve 13 is also used for transverse support of the expansion anchor 1 in the borehole and therefore corresponds in diameter to the nominal diameter.
  • the setting tool 2 has a sleeve-like partial body 15 with wrench surfaces 16 on the inside and a driving surface 17 on the end face for transmitting impacts to the end face 14 of the spacer sleeve 13.
  • an adapter device 18 in the form of standard grooves.
  • the expansion anchor 1 is inserted into the setting tool 2, so that the key surfaces 16 come into engagement with the key engagement surfaces 12 and the driving surface 17 of the setting tool 2 rests on the end face 14 of the spacer sleeve 13 , In this state, the expansion anchor 1 is inserted into a borehole (not shown) of a subsurface until it sits on the borehole bottom.
  • the anchor base part 3 and thus the expansion sleeve 6 are set in rotation by a combined rotary / impact movement of the impact drill.
  • the expansion sleeve 6 is axially displaced on the expansion section 5, thereby spreading the expansion tongues 8 radially outward along the sliding surfaces 11.

Abstract

The invention relates to an expansible anchor ( 1 ) made of metal for affixing a component to a substrate. Known expansible anchors ( 1 ) have an anchor element ( 3 ) with fixing means ( 4 ) and an expansion zone ( 5 ) of reduced diameter which widens in the direction of insertion of the expansible anchor. An expansion sleeve ( 6 ) having expansion tongues ( 8 ) and at least one cutter ( 9 ) for creating an undercut is mounted on the expansion zone ( 5 ) so as to be axially displaceable. In order to reduce the manufacturing costs for such an expansible anchor ( 1 ), the invention proposes that the expansion sleeve ( 6 ) consists of hardened steel and the predetermined bending lines ( 10 ) are straight. The invention also proposes a setting tool ( 2 ) for setting such an expansible anchor ( 1 ), which has key-surfaces ( 16 ), a driving surface ( 17 ) and an adapter device ( 18 ).

Description

Beschreibung description
Spreizanker aus Metall und Setzwerkzeug hierfürExpansion anchors made of metal and setting tool therefor
Die Erfindung betrifft einen Spreizanker aus Metall mit den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to an expansion anchor made of metal with the features of the preamble of claim 1.
Aus der EP 0 217 053 B1 ist ein derartiger Spreizanker zur Befestigung eines Bauteils an einem Untergrund bekannt. Der bekannte Spreizanker weist ein Ankergrundteil mit einem Außengewinde als Befestigungsmittel und einem im Durchmesser reduzierten, sich in Einbringrichtung des Spreizankers konisch erweiternden Spreizabschnitt auf. Auf diesen Spreizabschnitt ist axial verschiebbar eine Spreizhülse aufgesetzt. Diese weist einen Grundkörper auf, an den nach vorn abstehende Spreizzungen entlang einer Sollbiegelinie ausgebildet sind. Durch Aufschieben der Spreizhülse auf den Spreizabschnitt sind die Spreizzungen aufspreizbar, um den Spreizanker in einer Hinterschneidung zu verankern. Die Spreizhülse weist Schneiden an den dem Bohrlochgrund zugewandten Stirnenden der Spreizzungen auf, mittels derer dieEP 0 217 053 B1 discloses an expansion anchor of this type for fastening a component to a substrate. The known expansion anchor has an anchor base part with an external thread as a fastening means and a diameter-reduced expansion section that widens conically in the direction of insertion of the expansion anchor. An expansion sleeve is placed axially displaceably on this expansion section. This has a base body, on which protruding tabs are formed along a predetermined bending line. By pushing the expansion sleeve onto the expansion section, the expansion tongues can be expanded in order to anchor the expansion anchor in an undercut. The expansion sleeve has cutting edges on the ends of the expansion tongues facing the bottom of the borehole, by means of which the
Hinterschneidung herstellbar ist. Dazu wird der bekannte Spreizanker in ein zylindrisches Bohrloch eingeführt und die Spreizhülse beispielsweise mittels einer Hammerbohrmaschine auf das Spreizelement auftrieben und zugleich in Rotation versetzt. Hierdurch wird ein radialer Abtrag in Form einer Bohrlocherweiterung erzeugt. Zur Bildung der Schneiden werden Schneideinsätze aus Hartmetall vorgeschlagen.Undercut can be produced. For this purpose, the known expansion anchor is inserted into a cylindrical borehole and the expansion sleeve is driven onto the expansion element, for example by means of a hammer drill, and at the same time set in rotation. This creates a radial removal in the form of a borehole extension. Cutting inserts made of hard metal are proposed to form the cutting edges.
Allerdings erfordert das Einsetzen und Befestigen dieser Schneideinsätze in den Spreizzungen neben den Materialkosten einen erheblichen Herstellungsaufwand. Hierdurch wird der als Massenprodukt hergestellte Spreizanker teuer. Verzichtet man bei der bekannten Ausgestaltung des Spreizankers jedoch auf die Einsätze und versucht statt dessen dem gesamten Material der Spreizhülse eine ausreichende Härte undHowever, in addition to the material costs, the insertion and fastening of these cutting inserts in the expansion tongues requires a considerable manufacturing outlay. This makes the expansion anchor mass-produced expensive. If the known design of the expansion anchor is dispensed with, however, the inserts are tried and instead the entire material of the expansion sleeve is sufficiently hard and
Festigkeit zu verleihen, um die Schneiden an den Spreizzungen selbst auszubilden, so scheitert dies daran, dass es beim Aufspreizen der Spreizzungen häufig zum Reißen oder Abbrechen entlang der Sollbiegelinie kommt. Dies liegt darin begründet, dass die Sollbiegelinien, wie bei sämtlichen bekannten Spreizankern, aufgrund der Hülsenform gekrümmt sind. Das gewünschte Ausknicken der Spreizzungen wird hierdurch erschwert, da die Krümmung stabilisierend wirkt. Zum Ausknicken muss das Material erheblich umgeformt werden, was eine entsprechende Duktilität und geringe Wandstärken erfordert. Gerade dies steht jedoch im Gegensatz zu der geforderten Härte der Schneiden, um auch im hochfesten Beton die Wirksamkeit der Schneiden zu gewährleisten.To give strength in order to form the cutting edges on the spreading tongues themselves, this fails because the spreading of the spreading tongues often results in tearing or breaking off along the predetermined bending line. The reason for this is that, as with all known expansion anchors, the predetermined bending lines are curved due to the sleeve shape. The desired buckling of the expansion tongues is hereby difficult because the curvature has a stabilizing effect. In order to buckle, the material has to be shaped considerably, which requires a corresponding ductility and small wall thicknesses. However, this is precisely in contrast to the required hardness of the cutting edges in order to ensure the effectiveness of the cutting edges even in high-strength concrete.
Der Erfindung liegt daher die Aufgabe zu Grunde, einen Spreizanker der eingangs genannten Art zu schaffen, der bei gleicher oder verbesserter Leistungsfähigkeit geringere Herstellkosten aufweist.The invention is therefore based on the object of creating an expansion anchor of the type mentioned which, with the same or improved performance, has lower manufacturing costs.
Diese Aufgabe wird erfindungsgemäß durch den Spreizanker mit den Merkmalen des Anspruchs 1 sowie dem Setzwerkzeug mit den Merkmalen des Anspruchs 6 gelöst. Der erfindungsgemäße Spreizanker weist eine Spreizhülse aus gehärtetem Stahl auf. Damit es nicht zu den genannten Versagensproblemen entlang der Sollbiegelinie kommt, ist diese gerade. In diesem Unterschied liegt der entscheidende Vorteil der Erfindung. Zum Ausknicken der Spreizzungen sind erheblich geringere Kräfte notwendig und diese sind wesentlich homogener entlang der Sollbiegelinie verteilt. Damit kann die Spreizhülse aus einem harten, hochfesten Material ausgebildet sein, das entsprechend spröder als die bisher eingesetzten Materialien ist. Auch kann eine größere Wandungsdicke für die Spreizhülse, insbesondere im Bereich der Sollbiegelinie, gewählt werden. Vorzugsweise wird die Spreizhülse als Stanzbiegeteil ausgeführt, das nach der Formgebung gehärtet und dann montiert wird.This object is achieved by the expansion anchor with the features of claim 1 and the setting tool with the features of claim 6. The expansion anchor according to the invention has an expansion sleeve made of hardened steel. In order to avoid the mentioned failure problems along the nominal bending line, this is straight. This difference is the decisive advantage of the invention. Significantly lower forces are required to buckle the expansion tongues, and these are distributed much more homogeneously along the predetermined bending line. The expansion sleeve can thus be formed from a hard, high-strength material which is correspondingly more brittle than the materials previously used. A larger wall thickness can also be selected for the expansion sleeve, in particular in the area of the predetermined bending line. The expansion sleeve is preferably designed as a stamped and bent part that is hardened after shaping and then assembled.
In einer bevorzugten Ausführungsform weist der Spreizabschnitt ebene Gleitflächen für jede Spreizzunge auf. Eine einfache Herstellbarkeit ergibt sich für vier Gleitflächen bzw. Spreizzungen, denkbar sind aber auch mehr oder weniger. Ebene Gleitflächen haben einerseits den Vorteil, dass die Spreizzungen flächig geführt werden, während ein rotationssymmetrischer konischer Spreizabschnitt eine Linienberührung bewirken würde. Durch die flächige Führung ergibt sich wiederum eine homogene Spannungsverteilung im Bereich der Sollbiegelinie. Anderseits ergibt sich als wesentlicher Vorteil, dass die Drehmomentübertragung für die Rotationsbewegung der Schneiden über das Ankergrundteil erfolgen kann. Während bei den bekannten Spreizankern die Spreizhülse von einem hülsenartigen Setzwerkzeug über Mitnehmerklauen angetrieben werden muss, kann bei dieser Ausgestaltung der Erfindung auf eine derartige, störanfällige Drehmomentübertragung verzichtet werden. Statt dessen kann das Ankergrundteil durch ein stabiles Werkzeug in Rotation versetzt werden. Die ebenen Gleitflächen bewirken dabei eine Mitnahme der Spreizzungen. Die Spreizhülse muss lediglich axial gegenüber dem rotierenden Ankergrundteil verschoben werden. Vorzugsweise weist ein derart ausgeführter Spreizanker eine Distanzhülse auf, die der Übertragung von SchlägenIn a preferred embodiment, the expansion section has flat sliding surfaces for each expansion tongue. Four sliding surfaces or spreading tongues are easy to produce, but more or less are also conceivable. Flat sliding surfaces have the advantage, on the one hand, that the expansion tongues are guided flat, while a rotationally symmetrical conical expansion section would bring about a line contact. The flat guidance in turn results in a homogeneous stress distribution in the area of the predetermined bending line. On the other hand, there is an essential advantage that the torque transmission for the rotational movement of the cutting edges can take place via the anchor base part. While in the known expansion anchors the expansion sleeve has to be driven by a sleeve-like setting tool via driver claws, this type of torque transmission, which is prone to failure, can be dispensed with in this embodiment of the invention. Instead, the anchor base can pass through a stable tool is rotated. The flat sliding surfaces cause the spread tongues to be carried along. The expansion sleeve only has to be displaced axially relative to the rotating anchor base. An expansion anchor designed in this way preferably has a spacer sleeve which is used to transmit impacts
5 eines Setzwerkzeugs auf die Spreizhülse zu deren axialer Verschiebung dient.5 of a setting tool on the expansion sleeve for the axial displacement thereof.
Selbstverständlich sind die beiden Hülsen auch einstückig ausführbar. Eine separate Distanzhülse hat jedoch den Vorteil, dass das vergleichsweise teure Material der Spreizhülse nur für den hierfür notwendigen Bereich verwendet wird. Wird die Spreizhülse als Stanzbiegeteil hergestellt, so kann außerdem für diese ein gegenüberOf course, the two sleeves can also be made in one piece. However, a separate spacer sleeve has the advantage that the comparatively expensive material of the expansion sleeve is only used for the area required for this. If the expansion sleeve is manufactured as a stamped and bent part, it can also be used as a counterpart
0 dem Nenndurchmesser kleinerer Durchmesser gewählt werden, um unnötige Reibung entlang der Bohrlochwand zu vermeiden. Die Distanzhülse, die sich dagegen nicht mitdrehen muss, kann mit Nenndurchmesser ausgeführt werden, um dem Spreizanker eine spielfreie Querkraftaufnahme zu ermöglichen.0 the nominal diameter smaller to avoid unnecessary friction along the borehole wall. The spacer sleeve, which on the other hand does not have to rotate, can be designed with a nominal diameter in order to enable the expansion anchor to absorb lateral forces without play.
5 Im Falle ebener Gleitflächen weist das Ankergrundteil vorzugsweise im Bereich der5 In the case of flat sliding surfaces, the anchor base preferably has in the area of
Befestigungsmittel Schlüsselangriffsflächen auf. Im Falle eines Außengewindes als Befestigungsmittel können diese beispielsweise als zwei seitliche Abflachung ausgeführt sein, im Falle eines Innengewindes als Befestigungsmittel in Form von zwei seitlichen Nuten. Dabei ist darauf zu achten, dass ausreichend tragende Gewindeanteile erhaltenFasteners on key attack surfaces. In the case of an external thread as a fastening means, these can be designed, for example, as two lateral flats, in the case of an internal thread as a fastening means in the form of two lateral grooves. It is important to ensure that there is sufficient load-bearing thread
:0 bleiben.: 0 stay.
Um einen derartigen Spreizanker setzen zu können, schlägt die Erfindung ein Setzwerkzeug vor, dass entsprechende Schlüsselflächen sowie eine Treibfläche und eine Adaptereinrichtung zur Aufnahme des Setzwerkzeugs beispielsweise in einerIn order to be able to set such an expansion anchor, the invention proposes a setting tool that has corresponding key surfaces as well as a driving surface and an adapter device for receiving the setting tool, for example, in one
!5 Schlagbohrmaschine aufweist. Zum Setzen des Spreizankers wird dieser mit seinem! 5 impact drill. To set the expansion anchor, this is with his
Ankergrundteil auf das Setzwerkzeug aufgesteckt, wobei Schlüsselangriffsflächen und Schlüsselflächen gegenseitig in Eingriff gebracht werden. Im aufgesteckten Zustand sitzt die Treibfläche auf der Spreizhülse - bzw. der Distanzhülse, falls vorhanden - auf. Im Weiteren wird der Spreizanker in das Bohrloch bis zum Aufsitzen auf dessenThe base part of the anchor is placed on the setting tool, key engagement surfaces and key surfaces being brought into engagement with one another. When attached, the drive surface sits on the expansion sleeve - or the spacer sleeve, if present. The expansion anchor is then inserted into the borehole until it is seated on it
10 Bohrlochgrund eingeführt. Durch eine Dreh-/Schlagbewegung des Werkzeugs, erzeugt beispielsweise von einer Schlagbohrmaschine, wird das Ankergrundteil und damit die Schneiden an der Spreizhülse in Rotation gebracht und gleichzeitig die Spreizhülse über den Spreizabschnitt des Ankergrundteils getrieben. Die Drehbewegung bewirkt, dass die Schneiden einen Abtrag und damit eine Hinterscheidung im Bohrloch erzeugen. Nach10 bottom of hole introduced. By rotating / striking the tool, generated for example by an impact drill, the anchor base part and thus the cutting edges on the expansion sleeve are rotated and at the same time the expansion sleeve is driven over the expansion section of the anchor base part. The rotary movement causes the cutting edges to cut and thus create a differentiation in the borehole. To
;5 erfolgter Verspreizung wird das Setzwerkzeug abgezogen. Eine Ausführungsform des Setzwerkzeugs für Spreizanker mit Außengewinde sieht vor, dass dieses einen hülsenartigen Teilkörper mit den Schlüsselflächen an der Innenseite sowie der Treibfläche an der Stirnseite aufweist. Hierdurch wird ein sehr einfacher Aufbau erreicht. Für Spreizanker mit Innengewinde ist ein bolzenartiger Teilkörper mit Schlüsselflächen an der Außenseite, beispielsweise in Form eines Rechteckquerschnitts, denkbar, wobei sich axial an diesen Teilkörper eine Schulter zur Bildung der Treibfläche anschließt.; 5 spreading, the setting tool is removed. One embodiment of the setting tool for expansion anchors with an external thread provides that it has a sleeve-like partial body with the key surfaces on the inside and the driving surface on the end face. This results in a very simple structure. For expansion anchors with an internal thread, a bolt-like partial body with key surfaces on the outside, for example in the form of a rectangular cross section, is conceivable, with a shoulder axially adjoining this partial body to form the driving surface.
Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Die Figur zeigt einen erfindungsgemäßen Spreizanker 1 aus Metall sowie ein erfindungsgemäßes Setzwerkzeug 2. Der Spreizanker 1 dient der Befestigung eines nicht dargestellten Gegenstandes an einem ebenfalls nicht dargestellten Untergrund. Der Spreizanker 1 weist ein Ankergrundteil 3 mit einem Außengewinde 4 als Befestigungsmittel für den Gegenstand und einem im Durchmesser reduzierten, sich in Richtung des Ankerendes 6 konisch erweiternden Spreizabschnitt 5 auf. Auf den Spreizabschnitt 5 ist eine als Stanzbiegeteil gefertigte Spreizhülse 6 aus gehärtetem Stahl mit einem Grundkörper 7 und vier Spreizzungen 8 axial verschiebbar aufgesetzt. Durch eine axiale Verschiebung in Richtung zum Ankerende 6 werden die Spreizzungen 8 radial nach außen gegen eine Bohrlochwand verspreizt. Die Spreizzungen 8 weisen Schneiden 9 zur Erzeugung einer Hinterschneidung auf. Die Spreizzungen 8 sind über gerade Sollbiegelinien 10 an den Grundkörper 7 angebunden. Hierdurch ist ein leichtes Ausknicken der Spreizzungen 8 möglich, ohne dass der gehärtete Stahl bricht. Begünstigt wird dies außerdem durch die vier ebenen Gleitflächen 11. Diese bewirken außerdem, dass ein Drehmoment vom Ankergrundteil 3 auf die Spreizhülse 6 übertragbar ist. Damit dieses Drehmoment von einem Werkzeug, hier dem Setzwerkzeug 2, auf das Ankergrundteil 3 übertragbar ist, weist dieses Schlüsselangriffsflächen 12 auf. Zur Übertragung einer axialen Kraft auf die Spreizhülse 6 weist der Spreizanker 1 eine Distanzhülse 13 mit einer Stirnfläche 14 auf. Die Distanzhülse 13 dient außerdem der Querabstützung des Spreizankers 1 im Bohrloch und entspricht daher im Durchmesser dem Nenndurchmesser.The invention is explained in more detail below with reference to an embodiment shown in the drawing. The figure shows an expansion anchor 1 according to the invention made of metal and a setting tool 2 according to the invention. The expansion anchor 1 is used to fasten an object, not shown, to a base, also not shown. The expansion anchor 1 has an anchor base part 3 with an external thread 4 as fastening means for the object and a spreading section 5 which is reduced in diameter and widens conically in the direction of the anchor end 6. An expansion sleeve 6 made of hardened steel with a base body 7 and four expansion tongues 8 is axially displaceably placed on the expansion section 5 as a stamped and bent part. By means of an axial displacement in the direction of the armature end 6, the expansion tongues 8 are spread radially outwards against a borehole wall. The spreading tongues 8 have cutting edges 9 for producing an undercut. The expansion tongues 8 are connected to the base body 7 via straight predetermined bending lines 10. As a result, the expansion tongues 8 can be easily bent out without the hardened steel breaking. This is also favored by the four flat sliding surfaces 11. These also have the effect that a torque can be transmitted from the anchor base part 3 to the expansion sleeve 6. So that this torque can be transferred from a tool, here the setting tool 2, to the anchor base part 3, this has key engagement surfaces 12. To transmit an axial force to the expansion sleeve 6, the expansion anchor 1 has a spacer sleeve 13 with an end face 14. The spacer sleeve 13 is also used for transverse support of the expansion anchor 1 in the borehole and therefore corresponds in diameter to the nominal diameter.
Das Setzwerkzeug 2 weist einen hülsenartigen Teilkörper 15 mit Schlüsselflächen 16 an der Innenseite sowie eine Treibfläche 17 an der Stirnseite zur Übertragung von Stößen auf die Stirnfläche 14 der Distanzhülse 13 auf. Zur Aufnahme des Setzwerkzeugs 2, beispielsweise in einer Schlagbohrmaschine (nicht dargestellt), weist es eine Adaptereinrichtung 18 in Form normungsgemäßer Nuten auf.The setting tool 2 has a sleeve-like partial body 15 with wrench surfaces 16 on the inside and a driving surface 17 on the end face for transmitting impacts to the end face 14 of the spacer sleeve 13. To hold the setting tool 2, for example in an impact drill (not shown), it has an adapter device 18 in the form of standard grooves.
Zum Setzen des Spreizankers 1 mit dem in eine Schlagbohrmaschine eingespannten Setzwerkzeug 2 wird der Spreizanker 1 in das Setzwerkzeug 2 gesteckt, so dass die Schlüsselflächen 16 mit den Schlüsselangriffsflächen 12 in Eingriff kommen und die Treibfläche 17 des Setzwerkzeugs 2 auf der Stirnfläche 14 der Distanzhülse 13 aufsitzt. In diesem Zustand wird der Spreizanker 1 in ein nicht dargestelltes Bohrloch eines Untergrunds eingeschoben, bis er auf dem Bohrlochgrund aufsitzt. Durch eine kombinierte Drefv/Schlagbewegung der Schlagbohrmaschine wird das Ankergrundteil 3 und damit die Spreizhülse 6 in Rotation versetzt. Gleichzeitig wird die Spreizhülse 6 auf dem Spreizabschnitt 5 axial verschoben und hierdurch die Spreizzungen 8 entlang der Gleitflächen 11 radial nach außen verspreizt. Durch die Rotation der Spreizhülse 6 erzeugen die Schneiden 9 einen Abtrag in Form einer radialen Erweiterung des Bohrlochs in diesem Bereich. Diese Erweiterung wirkt als Hinterschnitt. Hierdurch wird eine formschlüssige Verankerung im Bohrloch erreicht. Nach dem Setzvorgang wird das Setzwerkzeug 2 einfach vom Spreizanker 1 abgezogen. To set the expansion anchor 1 with the setting tool 2 clamped in an impact drill, the expansion anchor 1 is inserted into the setting tool 2, so that the key surfaces 16 come into engagement with the key engagement surfaces 12 and the driving surface 17 of the setting tool 2 rests on the end face 14 of the spacer sleeve 13 , In this state, the expansion anchor 1 is inserted into a borehole (not shown) of a subsurface until it sits on the borehole bottom. The anchor base part 3 and thus the expansion sleeve 6 are set in rotation by a combined rotary / impact movement of the impact drill. At the same time, the expansion sleeve 6 is axially displaced on the expansion section 5, thereby spreading the expansion tongues 8 radially outward along the sliding surfaces 11. Due to the rotation of the expansion sleeve 6, the cutting edges 9 produce a removal in the form of a radial expansion of the borehole in this area. This extension acts as an undercut. A positive anchoring in the borehole is hereby achieved. After the setting process, the setting tool 2 is simply pulled off the expansion anchor 1.

Claims

Patentansprüche claims
1. Spreizanker (1) aus Metall zur Befestigung eines Bauteils an einem Untergrund, wobei der Spreizanker (1) ein Ankergrundteil (3) mit Befestigungsmitteln (4) und einem im Durchmesser reduzierten, sich in Einbringrichtung des Spreizankers erweiternden Spreizabschnitt (5) aufweist, auf den eine Spreizhülse (6) mit Spreizzungen (8) und mindestens einer Schneide (9) zur Erzeugung einer Hinterschneidung axial verschiebbar aufgesetzt ist, wobei die Spreizzungen (8) jeweils an einer Sollbiegelinie (10) mit einem Grundköper (7) der Spreizhülse (6) verbunden sind, dadurch gekennzeichnet, dass die Spreizhülse (6) aus gehärtetem Stahl besteht und die Sollbiegelinien (10) gerade sind.1. expansion anchor (1) made of metal for fastening a component to a substrate, the expansion anchor (1) having an anchor base part (3) with fastening means (4) and a reduced-diameter expansion section (5) widening in the direction of insertion of the expansion anchor, on which a spreading sleeve (6) with spreading tongues (8) and at least one cutting edge (9) is axially displaceably placed to produce an undercut, the spreading tongues (8) in each case on a predetermined bending line (10) with a basic body (7) of the spreading sleeve ( 6) are connected, characterized in that the expansion sleeve (6) consists of hardened steel and the predetermined bending lines (10) are straight.
2. Spreizanker nach Anspruch 1 , dadurch gekennzeichnet, dass die Spreizhülse (6) ein Stanzbiegeteil ist.2. Expansion anchor according to claim 1, characterized in that the expansion sleeve (6) is a stamped and bent part.
3. Spreizanker nach Anspruch 1 , dadurch gekennzeichnet, dass der sich erweiternde Teil des Spreizabschnitt (5) ebene Gleitflächen (11 ) aufweist.3. Expansion anchor according to claim 1, characterized in that the expanding part of the expansion section (5) has flat sliding surfaces (11).
4. Spreizanker nach Anspruch 1 , dadurch gekennzeichnet, dass der Spreizanker (1) eine Distanzhülse (13) aufweist.4. expansion anchor according to claim 1, characterized in that the expansion anchor (1) has a spacer sleeve (13).
5. Spreizanker nach Anspruch 1, dadurch gekennzeichnet, dass das Ankergrundteil (3) im Bereich der Befestigungsmittel (4) Schlüsselangriffsflächen (12) aufweist.5. Expansible anchor according to claim 1, characterized in that the anchor base part (3) in the area of the fastening means (4) has key engagement surfaces (12).
6. Setzwerkzeug (2) zum Setzen eines Spreizankers (1), insbesondere nach Anspruch 5, dadurch gekennzeichnet, dass das Setzwerkzeug (2) mit den Schlüsselangriffsflächen (12) des Spreizankers (1) korrespondierende Schlüsselflächen (16), eine Treibfläche (17) sowie eine Adaptereinrichtung (18) aufweist. Setzwerkzeug nach Anspruch 6, dadurch gekennzeichnet, dass das Setzwerkzeug (2) einen hülsenartigen Teilkörper (15) mit den Schlüsselflächen (16) an der Innenseite sowie der Treibfläche (17) an der Stirnseite aufweist. 6. setting tool (2) for setting an expansion anchor (1), in particular according to claim 5, characterized in that the setting tool (2) with the key engagement surfaces (12) of the expansion anchor (1) corresponding key surfaces (16), a driving surface (17) and an adapter device (18). Setting tool according to claim 6, characterized in that the setting tool (2) has a sleeve-like partial body (15) with the key surfaces (16) on the inside and the driving surface (17) on the front side.
EP04732299A 2003-05-27 2004-05-12 Expanding anchor made of metal and placing tool therefor Active EP1627154B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10324005A DE10324005A1 (en) 2003-05-27 2003-05-27 Metal expansion anchor and setting tool therefor
PCT/EP2004/005051 WO2004106754A1 (en) 2003-05-27 2004-05-12 Expanding anchor made of metal and placing tool therefor

Publications (2)

Publication Number Publication Date
EP1627154A1 true EP1627154A1 (en) 2006-02-22
EP1627154B1 EP1627154B1 (en) 2007-01-17

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US (1) US20060263167A1 (en)
EP (1) EP1627154B1 (en)
JP (1) JP2006526121A (en)
KR (1) KR20050121742A (en)
CN (1) CN1795336A (en)
AT (1) ATE351990T1 (en)
DE (2) DE10324005A1 (en)
DK (1) DK1627154T3 (en)
RU (1) RU2005140658A (en)
WO (1) WO2004106754A1 (en)
ZA (1) ZA200508216B (en)

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DE102012221114B3 (en) * 2012-11-19 2014-04-10 Hilti Aktiengesellschaft Setting tool for impact anchors
DE102013206387A1 (en) * 2013-04-11 2014-10-16 Hilti Aktiengesellschaft anchor
DE102013206388A1 (en) 2013-04-11 2014-10-16 Hilti Aktiengesellschaft Anchor with spreading area and cutting thread
KR20160041968A (en) * 2013-08-08 2016-04-18 가부시키가이샤 호와 Anchor bolt
CN105443530A (en) * 2014-09-07 2016-03-30 梁俊炫 Easy-to-pull expansion screw
CN111749964B (en) * 2020-05-26 2022-08-23 浙江斯泰新材料科技股份有限公司 Detachable rotary-striking rivet bolt
CN113864304B (en) * 2020-06-30 2023-06-13 喜利得股份公司 Installation device and installation method for self-drilling anchor bolt

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US4789284A (en) * 1987-11-05 1988-12-06 White Scott A Self-cutting expansion anchor
DE3835243A1 (en) * 1988-10-15 1990-04-19 Hilti Ag SPREADING ANCHOR
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Publication number Publication date
US20060263167A1 (en) 2006-11-23
JP2006526121A (en) 2006-11-16
DE502004002685D1 (en) 2007-03-08
DK1627154T3 (en) 2007-03-19
KR20050121742A (en) 2005-12-27
RU2005140658A (en) 2006-06-10
ZA200508216B (en) 2006-06-28
DE10324005A1 (en) 2004-12-16
WO2004106754A1 (en) 2004-12-09
ATE351990T1 (en) 2007-02-15
CN1795336A (en) 2006-06-28
EP1627154B1 (en) 2007-01-17

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